The urgent need for sustainability today demands new systems of thinking and new approaches to problem solving â€” new spheres of logic. Societies are no longer considered outside of or independent of the natural environment, neither can both exist outside of the influence of technology. The Logic of the NAC model is the unique conceptual basis and theoretical underpinning of our sustainability perspective which lives in the confluence of three spheres: Sociologic, Ecologic and Technologic (SET). The three spheres together form a regime of sustainability in which all three interactively control performance, viability and outcomes. Thus, each strategy within the Master Plan is assessed by these mutually reinforcing logics.
Economics, though traditionally understood as the third sphere of sustainability, is excluded from this SET not as a devaluation of the global phenomena, but to advance the assertion that a system of production of material wealth is not central to, but results from the collective endurance and progress of humankind as derived from this SET. The model posits the Logical SET of interrelationships as the basis for articulating a truly sustainable city. It is uniquely African and universally laudable.